The use of pen drives as an easy-to-carry storage device has increased in the recent past. Over 70 percent cyber security breaches in the armed forces are due to their unauthorised use. Officials use pen drives to store official data for use at their personal computers but from there, it is transmitted from their IP addresses to hackers from the’malware’ present in the pen drives. Measures have been taken by the other two services also to tighten their cyber security as IAF (Indian Air Force) also recently issued instructions to its personnel warning them against having any official data on their. personal computers.
Source: https://thehackernews.com/2012/10/army-usb-drive-responsible-for-over-70.html